/*
 * @Author:gxx
 * @Date: 2021-03-30 16:10:53
 * @Last Modified by: gxx
 * @Last Modified time: 2021-03-30 16:10:53
 * @Description: 分子量
*/

#include <iostream>
#include <vector>
#include <string>
#include <cmath>
#include <algorithm>
using namespace std;

#define C 12.01 H 1.008 O 16.00 N 14.01



int pares_s(string s){
    int len = s.length();
    vector<char>v1;
    vector<int>v2;
    for(int i = 0; i < len; i++){
        if(s[i]=='C' ||s[i]=='H'||s[i]=='O'||s[i]== 'N'){
            v1.push_back[s[i]]
        }
    }
}

int main(int argc, char **argv){
    string s;
    cin>>s;

    return 0;
}